एक या अधिक पशुओं के समूह को, जिन्हें कृषि सम्बन्धी परिवेश में भोजन, रेशे तथा श्रम आदि सामग्रियां प्राप्त करने के लिए पालतू बनाया जाता है, पशुधन के नाम से जाना जाता है। शब्द पशुधन, जैसा कि इस लेख में प्रयोग किया गया है, में मुर्गी पालन तथा मछली पालन सम्मिलित नहीं है; हालांकि इन्हें, विशेष रूप से मुर्गीपालन को, साधारण रूप से पशुधन में सम्मिलित किया जाता हैं।

Livestock are the domesticated animals raised in an agricultural setting in order to provide labour and produce diversified products for consumption such as meat, eggs, milk, fur, leather, and wool. The term is sometimes used to refer solely to animals who are raised for consumption, and sometimes used to refer solely to farmed ruminants, such as cattle, sheep, and goats. Horses are considered livestock in the United States. The USDA classifies pork, veal, beef, and lamb (mutton) as livestock, and all livestock as red meat. Poultry and fish are not included in the category. The latter is likely due to the fact that fish products are not governed by the USDA, but by the FDA.